Under-hood check

Check the connections on the battery for excess corrosion.

Check around the battery for obvious rust. If you see any, ask to remove the battery for a better look at the tray. If it's rusty assume the fender is rusty underneath it. We'll check the fender from below during the under-car check.

Take a look at the wires and vacuum lines next to the battery and look for damage from exposure to battery fumes. On this car, someone sprayed over these lines with some kind of black goop perhaps to try and protect against this.